British Rail Class 29

Specifications
Specifications
Configuration:;
• UIC	Bo'Bo'
• Commonwealth	Bo-Bo
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter	3 ft 7 in (1.092 m)
Minimum curve	3.5 chains (231.00 ft; 70.41 m)
Wheelbase	37 ft 0 in (11.28 m)
Length	51 ft 6 in (15.70 m)
Width	8 ft 8 in (2.64 m)
Height	12 ft 8 in (3.86 m)
Loco weight	73 long tons (74.2 t; 81.8 short tons)
Fuel capacity	460 imp gal (2,100 L; 550 US gal)
Prime mover	Paxman Ventura
Engine type	V12 diesel
Generator	DC generator
Traction motors	4 GEC DC motors
Transmission	Diesel electric
MU working	● Red Circle
Train heating	Steam
Train brakes	Vacuum

Type and origin
Type and origin
Power type	Diesel-electric
Builder	North British Locomotive Co.
Build date	1958–1960 (original Class 21)
Rebuilder	Paxman
Rebuild date	Rebuilt: 1963, 1965–1967
Number rebuilt	20

British Railways Class 29
British Railways Class 29
	D6121 in BR green livery with white stripe and large yellow warning panel and headcode at Inverness MPD, August 1968
Power type
Type and origin
Power type	Diesel-electric
Builder	North British Locomotive Co.
Build date	1958–1960 (original Class 21)
Rebuilder	Paxman
Rebuild date	Rebuilt: 1963, 1965–1967
Number rebuilt	20
Configuration:;
Specifications
Configuration:;
• UIC	Bo'Bo'
• Commonwealth	Bo-Bo
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter	3 ft 7 in (1.092 m)
Minimum curve	3.5 chains (231.00 ft; 70.41 m)
Wheelbase	37 ft 0 in (11.28 m)
Length	51 ft 6 in (15.70 m)
Width	8 ft 8 in (2.64 m)
Height	12 ft 8 in (3.86 m)
Loco weight	73 long tons (74.2 t; 81.8 short tons)
Fuel capacity	460 imp gal (2,100 L; 550 US gal)
Prime mover	Paxman Ventura
Engine type	V12 diesel
Generator	DC generator
Traction motors	4 GEC DC motors
Transmission	Diesel electric
MU working	● Red Circle
Train heating	Steam
Train brakes	Vacuum
Maximum speed
Performance figures
Maximum speed	80 mph (130 km/h)
Power output	Engine: 1,350 hp (1,010 kW)
Tractive effort	Maximum: 45,000 lbf (200 kN)
Brakeforce	50 long tons-force (498 kN)
Operators
Career
Operators	British Rail
Numbers	D6100–03/06–08/12–14/16/19, D6121/23/24/29/30/32/33/37
Axle load class	Route availability 6 (RA 5 from 1969)
Retired	1969–1971
Disposition	All scrapped

The British Rail Class 29 were a class of 20 diesel-electric Bo-Bo locomotives produced by the re-engining of the NBL Type 2 units. The units were designed for both passenger and freight trains.